Spieth and Walker edge ahead

Jordan Spieth and Jimmy Walker will take a narrow one-shot lead into the third round of the Pebble Beach National Pro-Am.

On another chilly day in California, US PGA Tour Rookie of the Year Sprieth carded a four-under-par 67 at Monterey Peninsula and Walker shot a three under 69 at Spyglass Hill to move to nine under for the tournament.

The American duo are just ahead of compatriot Hunter Mahan while first-round Andrew Loupe, who fell well short of matching his opening 63 as he carded a one over 73, finds himself at seven under.

Walker carded a bogey-free round, but Sprieth had a mixed day as he made six birdies while dropping shots at the par-4 fourth and the 18th holes.

“I seem to play well out here,” said Walker. “A lot of times, pars are really good. You’ve got to stay real patient. I was tested really early today. I hit some poor shots and I did some serious scrambling.”

Walker is on a good run on the US PGA Tour as he won last year’s Frys.com Open and also tasted success at the Sony Open in Hawaii in January.

Daniel Summerhays, Robert Garrigus, Ryan Palmer and Dudley Hart are at five under while four-time winner Phil Mickelson is tied for 17th and five shots off the pace after carding a one-over-par 73.